Shuttle threader and thread tensioner



Aug. 13, 1929. L. A. CADORET ,790

SHUTTLE THREADER AND THREAD TENSIONER Filed May 5, 1928 2 Sheets-Sheet lElai- 25? a /4 /6 Aug. 13, 1929. CADQRET 1,724,790

SHUTTLE THREADER AND THREAD TENSIONER Filed May 5, 1928 2 Sheets-Sheet 2ammo lamb a. a ore-z Patented Aug. 13, 1929.

UNITED STATES LOUIS ALEXANDBE CADORET, F PAWTUCKET, RHODE ISLAND.

SHUTTLE THREADER AND THREAD TENSIONER.

Application filed May 5,

The invention relates to improvements in means for effecting automaticthreading of shuttles, and for placing the requisite tension upon thethread.

One object of the invention is to provide an exceptionally simple andinexpensive, yet an efficient and reliable device for effectingautomatic shuttle threading.

A further aim is to provide unique means which may vertically float tothe necessary extent with thethread, and will at all times serve toplace the desired tension upon said thread.

Yet another object is to provide a simple and inexpensive constructionin which both the shuttle threading means and the thread tensioningmeans may be advantageously embodied.

With the foregoing in view, the invention resides in the novel subjectmatter hereinafter described and claimed, description being accomplishedby reference to the acc0m panying drawings.

Fig. 1 is a top plan View of a portion of a shuttle equipped with oneform of the invention.

Fig. 2 is a longitudinal sectional view through the shuttle illustratinga side elevation of the threader and tensioner.

Fig. 3 is a vertical transverse sectional view on line 33 of Fig. 2.

Figs. 4 and 5 are perspective views of the threader and tensioner,looking in different directions.

Fig. 6 is a top plan view form of construction.

Fig. 7 is a side elevation of the construction disclosed in Fig. 6.

Fig. Sis a horizontal sectional view on line 8-8 of Fig. 7.

Fig. 9 is a top plan View showing a still further form of the invention.

Fig. 10 is a side elevation of the device shown in Fig. 9.

Fig. 11 is a horizontal sectional view on line 1111 of Fig. 10.

All forms of the invention possess certain features in common, to whichone description will be directed. Then, the differences in constructionwill be pointed out.

The number 12 denotes a base plate to be anchored in a shuttle recess.Rising rigidly from one longitudinal edge of this base plate, is avertical wall 13, one end of which is directed laterally outward as at14 and then obliquely inward as at 15. The lower edge showing a modified1928. Serial No. 275,386.

16 of the inwardly directed portion 15, declmes from the terminal 17 ofsaid portion 15, to the lower end of the corner 18 at which said portion15 joins the portion 14. At this lower end of the corner 18, an eye 19is formed, the lower portion of said eye being open to admit a threadsliding down the edge 16 upon travel of the shuttle in the direction ofthe arrow A of Fig. 2. The part 20 of the wall portion 15, between theedge 16 and the eye 19, is curved and constitutes a slender eye-guardingfinger 20 preventing accidental throwing of the thread out of the eye.

Overlying the base plate 12, is a top plate 21, one longitudinal edge ofwhich is joined to the upper edges of all of the wall portions 131415,said top plate extending throughout the length of said edges. Thelongitudinal edge of plate 21, opposite the wall 13, is curveddownwardly and inwardly at 22, providing a hook formation to receive thethread when it is initiall engaged with the threader, upon travel of theshuttle in the direction A. The first time the shuttle moves in thisdirection, the thread in unwinding from the filling, whips laterally andin so doing enters the hook 22. Then, when the shuttle is reverselydriven along the lay, in the direction of the arrow A, the free end ofthe thread slides down the edge 16, snaps past the finger 20 and entersthe eye 19.

The device may be secured in the shuttle recess in any desired way, butI prefer to form the wall 13 with an opening 23 to receive theconventional threader anchoring pin 24.

Extending between the portions of the plates 1221, toward the filling,is a vertical pin 25 which is secured to at least one of said plates andpreferably to both of them, this pin being usually passed throughopenings in said plates and upset. Slidable and rotatable upon this pin25, are any desired number of thread tensioning members 26 of anyappropriate wear-resisting material, such as steel, glass, porcelain,etc. These members are free to both rotate and slide upon the pin 25 andthe are so shaped that their adjacent surfaces iverge outwardly toreadily admit the thread between them, as shown thread, they maintainthe requisite tension thereon. Moreover, rotation of the members 26,insures that any wear thereon shall be uniformly distributed, instead oftaking place along a single line. Then too, attention is invited to thefact that the members 26 are duplicates as to size and shape, each'beingprovided with an upper convex side and a lower convex side. Hence, whenthe adjacent thread-engaging faces of these members have becomeexcessively worn by the thread,

' ing member the other two faces of said members are still intact andmay be presented toward each other for engagement with the thread, uponremoval of the pin and insertion of a new pm.

In Figs. 6, 7 and 8, an additional vertical pin 25 is shown, disposed inthe angle between the wall portions 14 and 1-5. The upper end of thispin is suitably anchored to the top plate 21, and uponsaid pin, 1slidably and rotatably mount a thread tension- 26 which placesadditional tension upon the thread as it travels through the eye 19.

r If desired, instead of using the additional member 26, a pivotedthread-tensioning arm 26 may be provided at the inner side of the wall13, as shown in Figs. 9, 10 and 11, said arm being loosely pivoted sothat while its weight places tension upon the thread, it may float toany extent, which may be necessary.

All forms of the invention are of exceptional simplicity, yet areefiicient and in every way desirable. On account of the excellentresults obtainable therefrom, the details disclosed are preferablyfollowed. However,

within the scope of the invention as claimed,

. tical longitudinal wall rising variations may be made.-

I claim 1. A shuttle threader comprising a base plate for anchorage in ashuttle recess, a verfrom one edge of said base plate, one end portionof said wall being directed laterally outward for a short distance andthen directed obliquely inward, and a horizontal top plate extendingfrom the upper edge of said vertical wall and overlying'said base plate,said top plate being joined to the upper edges of all portions of saidvertical wall and extending to the terminal of said inwardly directedwall portion, said inwardly directed portion being declined from saidterminal to the lower end of the corner at which it joins said outwardlydirected portion, said corner having an eye open at its lower portion toadmit thread sliding down said declined edge, the part of said inwardlydirected portion between said declined edge and said eye constituting aneye-guarding finger.

2. A shuttle threader comprising a base plate for anchorage in a shuttlerecess, a vertical longitudinal wall rising from one edge of said baseplate, one end portion of said tion being declined from said terminal toa the lower end of the corner at which it joins said outwardly directedportion, said corner having an eye open at its lower portion to admitthread sliding down said declined edge, the part of said inwardlydirected portion between said declined edge and said eye constituting aneye-guarding finger.

3. A shuttle threader comprising a base plate for anchorage in a shuttlerecess, a vertical longitudinal wall rising from one edge of said baseplate, one end portion of said wall being directed laterally outward fora short distance and then directed obliquely inward, and a horizontaltop plate, extending from the upper edge of said vertical wall andoverlying said base plate, said top plate being joined to the upper edgeof all portions of said vertical wall and extendin to the terminal ofsaid inwardly directe wall portion, the longitudinal edge of said topplate opposite said vertical wall being curved downwardly and inwardlyto receive the thread when initially engaged with the threader, the endof said top plate opposite the aforesaid terminal being obliquelydisposed in substantially the same directionas said inwardly directedwall portion, said inwardly directed wall portion being declined fromsaid terminal to the lower end of the corner at which it joins saidoutwardly directed portion, said corner having an eye open at its lowerportion to admit thread sliding down said declined edge, the part ofsaid inwardly directed portion between said declined edge and said eyeconstituting an eye-guarding finger.

4. A shuttle threader and tensioner comprising a base plate, a top plateoverlying said base plate, a vertical wall extending betweenlongitudinal edges of said base and top plates, said vertical wallhaving a thread guiding eye and an edge declined thereto, and threadtensioning means disposed between said base and top plates.

5. A shuttle threader and thread tensioner comprising a base plate, atop plate overlying said base plate, a vertical wall connecting said topand base plates, said vertisecured to at least one thereof, and a threadtensioning member rotatable and slidable upon said pin.

6. A shuttle threader and thread tensioner comprising a base plate, atop plate over lying said base plate, a vertical wall connecting saidtop and base plates, one end of said vertical wall being directed firstoutwardly and then obliquely inward, the lower edge of said inwardlydirected wall portion being declined from its terminal to the lower endof the corner at which it joins said outwardly directed wall portion,said lower end of said corner being formed with a thread-guiding eye, avertical pin rigidly mounted within the angle between said outwardly andinwardly directed wall portions,

and a thread tensioning member rotatable and slidable upon said pin.

7 A structure as specified in claim 6; together with an additional pininwardly spaced from the first named pin and rigidly mounted in avertical position, and an additional thread tensioning member slidableand rotatable upon said additional pin.

8. In a thread tensioner, a pin, means for mountin said pin in avertical position, and a pair of t read-tensioning members rotatable andslidable on said pin, said members being substantial duplicates and eachhaving smooth upper and lower convex surfaces.

In testimony whereof I have hereunto affixed my signature.

LOUIS ALEXANDRE CADORET.

